Crop Regulation in Guava (Psidium guajava L.) cv. ‘Sardar’ as Influenced by Chemicals and Cultural Practices
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Date
2008
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Publisher
MPUAT, Udaipur
Abstract
A field experiment was conducted at Instrumental Farm, Department of Horticulture,
Rajasthan College of Agriculture, Udaipur during the year 2007-08. The soil of experimental
field was low in nitrogen, phosphorus and medium in potassium. The experiment consisted of
8 treatments comprising chemicals (Urea @ 10% and 15% foliar spray, NAA @ 1000 ppm)
and cultural practices (pruning at 75 % and 50 5 intensity, bending of shoots, withholding of
irrigation water) were applied during the course of investigation. These treatments were
evaluated under randomized block design with 4 replications by adopting uniform cultural
schedule during the experimentation.
The results revealed that all treatments had significant increase in vegetative growth
characteristics (number of newly emerged shoots, per cent increase in shoot growth after 30
days interval, canopy volume, PAR above and below canopy and leaf area index) physicochemical
characteristics(Fruit weight, fruit volume, pulp weight, pulp thickness, pulp: seed
ratio, TSS, acidity, ascorbic acid content, total sugars and reducing sugar) and yield
characteristics(number of flower per shoot, per cent fruit retension, per cent fruit set, number
of fruits per plant, yield per tree and yield per hectare), leaf nutrient content (N, P and K) and
available N, P, K status of soil at harvest over the Ambe bahar and control. Among the
treatments foliar spray of NAA @ 1000 ppm in the month of April (T7) significantly increase
the canopy volume (371.55 m3), fruit weight (152.60 g), fruit volume (139.25 cc), pulp weight
(147.25 g), pulp thickness (1.13 cm), pulp seed ratio (58:90), TSS (13.80%), ascorbic acid
(193.75 mg/100 gm pulp), total sugars (7.29%), reducing sugar (4.21%) and per cent fruit set
(60%) followed by application of single foliar spray of 15 per cent urea at 50 per cent bloom
stage (T2). Number of fruit per plant (389.50), yield per tree (56.38 kg) estimated fruit yield
(156.39 q ha-1) with higher net return (Rs.109394.88 ha-1) and B:C ratio (2.81:1) were
recorded maximum in T2.
Description
Crop regulation in guava (Psidium guajava L.) cv.‘Sardar’ as
influenced by chemicals and cultural practices
Keywords
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Citation
Agnihotri and Shukla, 2008